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Residual motion and function after glenohumeral or scapulothoracic arthrodesis
D T Harryman1, E D Walker, S L Harris
1Department of Orthopaedics, University of Washington, Seattle, Wash.
Journal of Shoulder and Elbow Surgery
|September 14, 2012
Summary
Shoulder fusion surgery significantly reduces humerothoracic motion. While glenohumeral fusion impacts personal care, both procedures improve function and reduce pain for patients.
Area of Science:
- Orthopedic Surgery
- Biomechanics
- Rehabilitation Medicine
Background:
- Shoulder arthrodesis (fusion) is performed to manage severe shoulder dysfunction.
- Understanding the impact of glenohumeral versus scapulothoracic fusion on shoulder motion and function is crucial for patient outcomes.
Purpose of the Study:
- To characterize humerothoracic motion and function after glenohumeral or scapulothoracic arthrodesis.
- To compare the functional outcomes of these two surgical approaches with normal shoulder function.
Main Methods:
- Evaluated 12 patients post-glenohumeral arthrodesis and 6 patients post-scapulothoracic arthrodesis.
- Measured residual motion using a spatial position sensor.
- Assessed activities of daily living and clinical range-of-motion.
Main Results:
- Both glenohumeral and scapulothoracic arthrodesis significantly decreased humerothoracic motion.
- Glenohumeral fusion preserved scapulothoracic motion comparable to normal shoulders.
- Scapulothoracic fusion resulted in decreased glenohumeral extension and external rotation, but unchanged internal rotation.
Conclusions:
- Glenohumeral fusion limits motion crucial for personal care but offers functional improvement and pain relief.
- Scapulothoracic fusion allows successful performance of most personal care activities.
- Both arthrodesis types alter shoulder biomechanics, with distinct functional trade-offs.